When I use that word I'm conveying "doggedness: persistent determination." (It's part of my Googled vocabulary.) Either way, it's certainly meant as a compliment. :)
I did. I wasn't trying to be secretive about it either, considering I was quoted and I then thanked him for pointing it out. Have I confused anyone here?
While we're at it, you should also read this: http://www.google.com/search?q=complement+vs+compliment